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公开(公告)号：US20240097496A1
公开(公告)日：2024-03-21
申请号：US18522429
申请日：2023-11-29
Applicant: DENSO CORPORATION
Inventor： Yusei NAKAYASHIKI , Masaya TAKAHASHI , Nobuhisa YAMAGUCHI , Eisuke TAKAHASHI
IPC: H02J50/12 , B60L53/122 , B60L53/62 , H02J50/90
CPC classification number: H02J50/12 , B60L53/122 , B60L53/62 , H02J50/90
Abstract: A power supply system includes: a power transmission circuit provided on the ground side; a high frequency generation circuit that supplies high-frequency electric power to the power transmission circuit; a measurement unit that measures a physical quantity corresponding to the degree of coupling between the power transmission circuit and a power reception circuit provided in a vehicle; and a control unit. When the degree of coupling is determined, based on the measured physical quantity, to be lower than a predetermined degree, the control unit sets the impedance of the power transmission circuit to a first impedance and thereby sets the power transmission circuit to a non-resonant state. In contrast, when the degree of coupling is determined to be not lower than the predetermined degree, the control unit sets the impedance of the power transmission circuit to a second impedance and thereby sets the power transmission circuit to a resonant state.
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公开(公告)号：US20210391757A1
公开(公告)日：2021-12-16
申请号：US17460479
申请日：2021-08-30
Applicant: DENSO CORPORATION
Inventor： Takuya KIGUCHI , Nobuhisa YAMAGUCHI , Eisuke TAKAHASHI , Hayato SUMIYA , Tomoyuki FUJIKAWA , Koji MAZAKI , Shimpei TAKITA , Masaki KANESAKI , Masaya TAKAHASHI , Kazuhiro UDA , Yusei NAKAYASHIKI , Mitsuru SHIBANUMA , Kazuyoshi OBAYASHI
Abstract: A dynamic wireless power transfer system performs, through a plurality of primary coils installed along a traveling direction of a road and a secondary coil mounted in a vehicle, power transfer to the vehicle while the vehicle is traveling. The secondary coil is an M-phase coil including M coils, M denoting an integer which is two or higher. The M coils each include a coil end extending along a front-rear direction of the vehicle and a main coil portion extending along a width direction of the vehicle, the M coils each being configured such that a magnetic resistance of a magnetic path where a magnetic flux of the coil end passes is higher than a magnetic resistance of a magnetic path where a magnetic flux of the main coil portion passes.
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3.发明申请公开(公告)号：US20250118996A1
公开(公告)日：2025-04-10
申请号：US18985471
申请日：2024-12-18
Applicant: DENSO CORPORATION
Inventor： Masaya TAKAHASHI , Yusei Nakayashiki , Mitsuru Shibanuma , Nobuhisa Yamaguchi
IPC: H02J50/12
Abstract: A first power supply unit rectifies, to first DC power, external AC power that is wirelessly received by a power receiving coil using magnetic coupling. The first power supply unit supplies the converted first DC power to one or more loads as main power. A second power supply unit is connected to an input stage of the first power supply unit, and outputs second DC power used for control of the first power supply unit. This makes it possible to stably ensure the second DC power used for control of the first power supply unit even if the one or more loads are configured to receive power from the first power supply unit.
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公开(公告)号：US20230110224A1
公开(公告)日：2023-04-13
申请号：US18078306
申请日：2022-12-09
Applicant: DENSO CORPORATION
Inventor： Mitsuru SHIBANUMA , Masaya TAKAHASHI , Eisuke TAKAHASHI , Nobuhisa YAMAGUCHI
Abstract: A coil unit for a contactless power supply system includes a plurality of coils for electric power transfer, and a magnetic flux reduction structure. The plurality of coils include a first coil and a second coil adjacent to the first coil in a predetermined direction. The magnetic flux reduction structure reduces, during electric power transfer using the first coil, magnetic flux by which the first coil causes an induced voltage or induced current to be generated in the second coil.
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公开(公告)号：US20220149664A1
公开(公告)日：2022-05-12
申请号：US17583822
申请日：2022-01-25
Applicant: DENSO CORPORATION
Inventor： Masaya TAKAHASHI , Eisuke TAKAHASHI , Hayato SUMIYA , Nobuhisa YAMAGUCHI
Abstract: A contactless power feeding device that supplies electric power to a power receiving device without contact includes: a power transmitting circuit that transmits alternating-current power; and a power transmitting resonator including a power transmitting coil. The input impedance of the power transmitting resonator is set low in a facing state in which a power receiving coil included in the power receiving device faces the power transmitting coil, and the input impedance of the power transmitting resonator is set high in a non-facing state in which the power receiving coil does not face the power transmitting coil.
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Patent Agency Ranking
公开(公告)号：US20220072965A1
公开(公告)日：2022-03-10
申请号：US17528718
申请日：2021-11-17
Applicant: DENSO CORPORATION
Inventor： Kouji MAZAKI , Nobuhisa YAMAGUCHI , Eisuke TAKAHASHI , Mitsuru SHIBANUMA , Shinpei TAKITA , Masaya TAKAHASHI , Hayato SUMIYA , Masaki KANESAKI , Takuya KIGUCHI , Kazuhiro UDA , Yuusei NAKAYASHIKI
Abstract: In a moving-object power supply system, a control unit selects, as a power transmission segment, one of segments included in at least one power transmission section. The control unit supplies, through a power supply circuit, power to the power transmission segment to thereby generate a magnetic field through a power transmission coil of the power transmission segment. The control unit determines, based on an ascertained first electrical characteristic of the power transmission segment and an ascertained second electrical characteristic of at least one power non-transmission segment, whether there is a malfunction in each of the power transmission segment and the at least one power non-transmission segment.
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公开(公告)号：US20190089267A1
公开(公告)日：2019-03-21
申请号：US16135039
申请日：2018-09-19
Applicant: DENSO CORPORATION
Inventor： Masaya TAKAHASHI , Nobuhisa YAMAGUCHI , Masaki KANESAKI , Shoichi TAKEMOTO
IPC: H02M7/538 , H02M7/5387 , H02M7/487
Abstract: In a power conversion apparatus, a controller calculates a duty ratio being a ratio of an on-duration of each of bridge-circuit switches configured by first to fourth switches to a switching period, and outputs a gate signal to each of the bridge-circuit switches. The controller adjusts the duty ratio of each of the bridge-circuit switches such that a switch-current difference becomes closer to a value obtained by multiplying an input-current difference by the predetermined target ratio that is a value greater than 0 and less than 1. The switch-current difference is a difference between a first switch current and a second switch current or a difference between a third switch current and a fourth switch current detected by a switch-current sensor at predetermined timings in the switching period. The input-current difference is a difference between input currents detected by an input-current sensor simultaneously with detection timings of switch currents.
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公开(公告)号：US20220037928A1
公开(公告)日：2022-02-03
申请号：US17503953
申请日：2021-10-18
Applicant: DENSO CORPORATION
Inventor： Masaya TAKAHASHI , Yuusei NAKAYASHIKI , Eisuke TAKAHASHI , Masaki KANESAKI , Kazuhiro UDA , Nobuhisa YAMAGUCHI
IPC: H02J50/12 , H02J50/90 , B60L53/122 , H02M1/12
Abstract: A contactless power supply device that supplies electric power to a vehicle in a contactless manner, includes: a power transmission resonance circuit; a power source circuit supplying direct-current power; and a power transmission circuit converting the direct-current power of the power source circuit into alternating-current power and supplying alternating-current power to the power transmission resonance circuit. The power transmission circuit includes: an inverter circuit converting the direct-current power of the power source circuit into alternating-current power; and a power transmission-side immittance conversion circuit adjusting the alternating-current power of the inverter circuit and supplies the adjusted alternating-current power to the power transmission resonance circuit. The ratio of a characteristic impedance of the power transmission-side immittance conversion circuit to an impedance backward on the power transmission resonance circuit side from the power transmission-side immittance conversion circuit is adjusted such that harmonic components in the alternating-current power of the inverter circuit becomes lessened.
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公开(公告)号：US20200153342A1
公开(公告)日：2020-05-14
申请号：US16745918
申请日：2020-01-17
Applicant: DENSO CORPORATION
Inventor： Masaya TAKAHASHI , Nobuhisa YAMAGUCHI , Masaki KANESAKI , Shoichi TAKEMOTO
IPC: H02M3/337 , H02M3/335 , H02M7/5395
Abstract: A power inversion apparatus includes a smoothing capacitor, first and second primary coils, a secondary coil, first to fourth switches of bridge circuit switches, a clamp capacitor, and a switch controller. The switch controller calculates a lower-arm duty ratio of each of the first and second switches using a map or a mathematical expression by feed-forward control based on an input voltage. The switch controller outputs a fixed value that is equal to or greater than a maximum value of the lower-arm duty ratio within a variation range of the input voltage as an upper-arm duty ratio of each of the third and fourth switches. The switch controller generates a pulse width modulation signal based on the calculated lower-arm duty ratio and the fixed value of the upper-arm duty ratio, and outputs the pulse width modulation signal to the bridge circuit switches.
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公开(公告)号：US20250105671A1
公开(公告)日：2025-03-27
申请号：US18974060
申请日：2024-12-09
Applicant: DENSO CORPORATION
Inventor： Masaya TAKAHASHI , Yusei NAKAYASHIKI , Mitsuru SHIBANUMA , Nobuhisa YAMAGUCHI
Abstract: A power output circuit includes a plurality of circuit blocks that are provided in power wirings to which power is inputted and connected to each other side by side. Each of the plurality of circuit blocks includes at least a filter in a last post-stage. Each of the plurality of filters includes a reactor and a capacitor connected to the reactor at a node differing from an output node. Either of the reactor and the capacitor provided in each of the plurality of filters is connected to the power wirings in series so as to connect with the output node. A connection line between the reactor and the capacitor in one filter is connected to a connection line between the reactor and the capacitor in the remaining other filter.
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